A young person’s systolic blood pressure of 142 mm Hg is not serious, but if the diastolic blood pressure is 142 mm Hg, then it is more serious. The normal systolic blood pressure range for adults is 90 mmHg to 139 mmHg, so 142 mmHg is a little high, but not very serious. The normal diastolic blood pressure in adults is 60 mm Hg to 89 mm Hg. If the diastolic blood pressure reaches 142 mm Hg, it is more serious. High blood pressure can cause headache, head swelling, dizziness, panic and shortness of breath and other symptoms, and in severe cases can cause cerebral hemorrhage. Young people with abnormal blood pressure should consult a doctor in a timely manner, and the doctor should formulate an individualized treatment plan according to the individual’s situation, so as to avoid delaying the condition.